Clutch pedal device for an electronic clutch system

Abstract

Clutch pedal device for an electronic clutch system, comprising: a clutch pedal (20) coupled to a pedal member (10) so as to be rotatable about a pedal shaft (21); a cam (40) fixedly coupled to the pedal element (10); a pedal mechanism (50) connected to the clutch pedal (20) while in contact with the cam (40); a pedal spring (60) provided on the pedal mechanism (50) and compressed such that a spring force increases when the clutch pedal (20) is depressed, so that a main pedal force is generated; and an elastic damper (70) provided on the pedal mechanism (50) and compressed together with the pedal spring (60) such that the spring force increases when the clutch pedal (20) is actuated, so that an additional pedal force is generated, wherein the pedal mechanism (50) comprises: an upper seat (51) and a lower seat (52) spaced apart from each other in a longitudinal direction of the clutch pedal (20); a roller (53) rotatably coupled to the upper seat (51) and in contact with the cam (40); a connecting piece (54) which rotatably connects the clutch pedal (20) to the upper seat (51); a seat holder (55) rotatably coupled to the clutch pedal (20) and fixedly coupled to the lower seat (52); a guide rod (56) formed on the upper seat (51); and a guide cylinder (57) formed on the lower seat (52) and having an inner opening (57a) to allow the guide rod (56) to be inserted and moved therein.

Description

[0001] The invention relates to a clutch pedal device for an electronic clutch system, and more particularly to a clutch pedal device for an electronic clutch system which is configured to generate the same level of pedal force (reaction force) as in a hydraulic clutch system when a clutch pedal is depressed and reduce a return speed while reducing a return force when the clutch pedal is returned to its original position.

[0002] A common vehicle with a manual transmission has a clutch device. The clutch device is installed between a flywheel and an input shaft of a transmission to interrupt the power of an internal combustion engine transmitted to the transmission as needed.

[0003] When shifting gears, a driver first depresses a clutch pedal to disengage the clutch device provided in the vehicle and then shifts into a desired gear by operating a shift lever. Releasing the clutch pedal reengages the clutch, completing a gear shift.

[0004] As in Fig. 1, a conventional hydraulic clutch system including a clutch master cylinder 3 and a clutch release cylinder 4 is configured between a clutch pedal 1 and a clutch device 2 such that a force generated by adding a spring force applied to the clutch pedal 1 when a driver steps on the clutch pedal 1 to a hydraulic pressure generated by the clutch master cylinder 3 and the clutch release cylinder 4 is a pedal force (reaction force).

[0005] Fig. Figure 2 is a schematic block diagram illustrating the configuration of an electronic clutch system. The electronic clutch system is advantageous in that it does not use a mechanical configuration using hydraulic pressure, thus significantly reducing its weight and cost compared to the hydraulic clutch system.

[0006] That is, when a driver steps on the clutch pedal 1 to shift gears, a pedal sensor 5 provided on the clutch pedal 1 detects a degree (rotation angle) to which the clutch pedal 1 is depressed and transmits a detected value as an electrical signal to a control device 6 (clutch control device, electronic control device for operating the clutch). The control device 6 receives the signal from the pedal sensor 5 and various signals, such as an engine speed, to automatically calculate an optimal clutch operating time most suitable for the vehicle conditions, so that the operation of an operating device 7 (clutch breaker device, DC motor, or the like) is controlled, and the clutch device 2 is engaged or disengaged by operating the operating device 7.

[0007] Therefore, compared to the hydraulic clutch system, the electronic clutch system does not use the clutch master cylinder 3 and the clutch release cylinder 4 to generate hydraulic pressure. When a driver depresses the clutch pedal 1, only the spring force applied to the clutch pedal 1 acts as a final pedal force (reaction force). This may cause a driver to feel undesirably different because the operation is lighter when depressing the clutch pedal 1 of the electronic clutch system compared to the hydraulic clutch system.

[0008] DE 10 2015 214 638 A1 describes a clutch pedal device for an electronic clutch system, comprising a clutch pedal coupled to a pedal element such that it is rotatable about a pedal shaft, a cam fixedly coupled to the pedal element, a pedal mechanism connected to the clutch pedal while being in contact with the cam, a pedal spring provided on the pedal mechanism and compressed such that a spring force increases when the clutch pedal is depressed, so that a main pedal force is generated, and an elastic damper provided on the pedal mechanism and compressed together with the pedal spring such that a spring force increases when the clutch pedal is depressed, so that an additional pedal force is generated.

[0009] Another pedal device is known from US 2002 / 0 056 337 A1.

[0010] The object of the invention is to provide a clutch pedal device for an electronic clutch system, which eliminates a different feeling by generating the same level of pedal force (reaction force) as in a hydraulic clutch system when a clutch pedal is depressed, and reduces a return force while reducing a return speed when the clutch pedal is returned to its original position, resulting in hysteresis.

[0011] The object is achieved according to the invention by a clutch pedal device for an electronic clutch system according to the features of claim 1. Advantageous further developments are described in the subclaims.

[0012] According to one aspect of the invention, there is provided a clutch pedal device for an electronic clutch system, comprising a clutch pedal coupled to a pedal member so as to be rotatable about a pedal shaft, a cam fixedly coupled to the pedal member, a pedal mechanism connected to the clutch pedal while in contact with the cam, a pedal spring provided on the pedal mechanism and compressed so that a spring force (or elastic force) increases (or is accumulated) when the clutch pedal is depressed, so that a main pedal force is generated, and an elastic (or resilient) damper provided on the pedal mechanism and compressed together with the pedal spring so that a spring force increases (or is accumulated) when the clutch pedal is depressed, so that an additional pedal force is generated.

[0013] A sum of an elastic compression force (or a compression spring force) of the pedal spring and an elastic compression force (or a compression spring force) of the elastic damper when the clutch pedal is depressed can be a pedal force (reaction force) of the clutch pedal.

[0014] When the clutch pedal is returned to its original position by releasing an operating force after the clutch pedal is depressed, a value obtained by adding a restoring force of the pedal spring to a restoring force of the elastic damper may be greater than a frictional force generated by the cam and the pedal mechanism, a value obtained by subtracting the frictional force generated by the cam and the pedal mechanism from the value obtained by adding the restoring force of the pedal spring to the restoring force of the elastic damper may be a restoring force of the clutch pedal, and the restoring force of the elastic damper and the frictional force generated by the cam and the pedal mechanism may act as a resistance value when the clutch pedal is returned to its original position, generating hysteresis.

[0015] A maximum compression time of the pedal spring may be equal to a maximum rotation time (full stroke) of the clutch pedal when the clutch pedal is depressed.

[0016] The pedal mechanism includes an upper seat and a lower seat spaced apart from each other in a longitudinal direction of the clutch pedal, a roller rotatably coupled to the upper seat and in contact with the cam, a link rotatably connecting the clutch pedal to the upper seat, a seat holder rotatably coupled to the clutch pedal with the lower seat fixedly coupled thereto, a guide rod formed on the upper seat, and a guide cylinder formed on the lower seat and having an inner opening for allowing the guide rod to be inserted and moved therein.

[0017] The elastic damper may be coaxially positioned in the pedal spring, the guide rod and the guide cylinder may be provided in the elastic damper so as to pass through it, and the pedal spring and the elastic damper may be supported at their two ends on the upper seat and the lower seat, respectively.

[0018] When the clutch pedal rotates around the pedal shaft, the roller may rotate in the same direction as the clutch pedal along a rotation radius with the pedal shaft at its center while always being in contact with the cam, a cam profile in contact with the roller may be formed on the cam to overlap the rotation radius of the roller, and an overlap area may be formed to gradually increase in a forward rotation direction when the clutch pedal is depressed.

[0019] A point where an overlap with the rotation radius of the roller on the cam profile is greatest may be an inflection point, and the inflection point may be a maximum rotation time (full stroke) of the clutch pedal.

[0020] The pedal spring may be a helical compression spring made of a steel material.

[0021] The elastic damper can be molded from either elastomer or rubber.

[0022] The pedal spring can be composed of either a coil spring formed from a solid body or a rubber spring formed from an elastic material.

[0023] The clutch pedal device for the electronic clutch system according to the invention is configured such that when a driver steps on the clutch pedal to operate the clutch pedal device for the electronic clutch system that does not use the hydraulic mechanism, the sum of the pressing force of the pedal spring and the pressing force of the elastic damper is generated as the pedal force (reaction force) of the clutch pedal, and thus the same level of pedal force (reaction force) as that of the hydraulic clutch system is generated, which prevents the occurrence of a different feeling and greatly contributes to improving marketability.

[0024] Furthermore, according to the invention, when a driver releases the clutch pedal to return the clutch pedal rearward, a value obtained by subtracting the frictional force corresponding to the resistance generated by the cam and the pedal mechanism from a value obtained by adding the restoring force of the pedal spring to the restoring force of the elastic damper acts as a resistance value when the clutch pedal is returned to its original position, so that both the restoring force and the returning speed of the clutch pedal are reduced, thereby preventing a driver's ankle from being twisted by the clutch pedal and further induced hysteresis.

[0025] The invention is explained in more detail with reference to the drawing. The drawing shows: Fig. 1 is a schematic block diagram showing the configuration of a hydraulic clutch system; Fig. 2 is a schematic block diagram illustrating the configuration of an electrical coupling system; Fig. 3 is a perspective view of a clutch pedal device for an electronic clutch system according to the invention; Fig. 4 a side view of Fig. 3; Fig. 5 a view of the clutch pedal device from Fig. 4, wherein one pedal element is omitted; Fig. 6 is a view showing a state in which the clutch pedal is released from Fig. 5 is rotated forwards by one pedal shaft; Fig. 7 is an exploded perspective view of a pedal mechanism, a pedal spring, and an elastic damper according to the invention; and Fig. 8 is a view illustrating a cam profile according to the invention.

[0026] Preferred embodiments of the invention are described in detail below with reference to the drawings.

[0027] As in the Fig. 3 to 8, a clutch pedal device for an electronic clutch system according to the invention comprises a pedal member 10 fixedly coupled to a vehicle body panel (instrument panel) under a driver's seat, and a clutch pedal 20 coupled to the pedal member 10 so as to be rotatable about a pedal shaft 21.

[0028] A pedal sensor 30 connected to the clutch pedal 20 is fixedly coupled to one side of the pedal member 10 to detect a rotation angle when the clutch pedal 20 is depressed. The rotation angle of the clutch pedal 20 detected by the pedal sensor 30 is transmitted to a controller. The controller receives the signal from the pedal sensor 30 and various signals, such as an engine speed, to automatically calculate an optimal clutch actuation time most suitable for the vehicle conditions, thereby controlling the operation of an actuating device, and engages or disengages a clutch device through the operation of the actuating device.

[0029] Furthermore, the clutch pedal device according to the invention is configured to generate a pedal force (reaction force) when a driver steps on the clutch pedal 20 (when the clutch pedal rotates forward). To this end, the clutch pedal device includes a cam 40 fixedly coupled to the pedal member 10, a pedal mechanism 50 connected to the clutch pedal 20 while in contact with the cam 40, a pedal spring 60 provided on the pedal mechanism 50 and compressed so that a spring force increases when the clutch pedal 20 is depressed, thereby generating a main pedal force, and an elastic damper 70 provided on the pedal mechanism 50 and compressed together with the pedal spring 60 so that a spring force increases when the clutch pedal 20 is depressed, thereby generating an additional pedal force.

[0030] A general clutch pedal device for an electronic clutch system is configured to generate pedal force (reaction force) only by a spring force applied to the clutch pedal device when a driver depresses a clutch pedal. Therefore, compared to the hydraulic clutch system, the electronic clutch system does not incorporate hydraulic pressure into the pedal force (reaction force), resulting in a different feel and consequently causing discomfort.

[0031] However, the clutch pedal device for an electronic clutch according to the invention is configured such that the sum of the elastic pressing force of the pedal spring 60 and the elastic pressing force of the elastic damper 70 is the pedal force (reaction force) when the clutch pedal 20 is depressed, and thus the same level of pedal force (reaction force) as in the hydraulic clutch system is generated, which prevents the occurrence of a different feeling and greatly contributes to improving marketability.

[0032] One embodiment of the invention is configured such that compression of the elastic damper 70 begins before the pedal spring 60 is maximally compressed when a driver steps on the clutch pedal 20. Thus, the sum of the elastic compression force of the pedal spring 60 and the elastic compression force of the elastic damper 70 is used as the pedal force (reaction force).

[0033] Preferably, when a driver steps on the clutch pedal 20 to operate it, the pedal spring 60 and the elastic damper 70 are compressed almost simultaneously, and the spring force for the reaction force increases.

[0034] According to the invention, the maximum compression time of the pedal spring 60 when a driver steps on the clutch pedal 20 is equal to the maximum rotation time (full stroke) of the clutch pedal 20. Thereby, the sum of the elastic compression force of the pedal spring 60 and the elastic compression force of the elastic damper 70 is used as the pedal force (reaction force).

[0035] The pedal spring 60 is preferably composed of a helical compression spring made of a steel material to achieve rigidity and strength. The elastic damper 70 is preferably formed of any of a variety of materials including, but not limited to, an elastomer, such as synthetic resin or rubber.

[0036] The elastic damper 70 formed of elastomer or rubber is configured to delay a return time when the elastic damper 70 is elastically returned compared to the pedal spring 60 made of the steel material, which contributes to realizing the hysteresis when the clutch pedal 20 is returned.

[0037] The pedal spring 60 may be composed of either a coil spring of a solid body or a rubber spring of an elastic material.

[0038] In addition, when a driver releases the clutch pedal 20 to release the operating force, the value obtained by adding the return force of the pedal spring 60 acting in a direction (rearward) in which the clutch pedal 20 is returned to the return force of the elastic damper 70 is greater than the friction force generated by the cam 40 and the pedal mechanism 50. If the friction force generated by the cam 40 and the pedal mechanism 50 is greater than the sum of the return force of the pedal spring 60 and the return force of the elastic damper 70, the clutch pedal 20 will not be returned rearward even if a driver releases the clutch pedal 20.In order to smoothly return the clutch pedal 20, the sum of the return force of the pedal spring 60 and the return force of the elastic damper 70 is preferably greater than the friction force generated by the cam 40 and the pedal mechanism 50.

[0039] According to the embodiment of the invention, when a driver steps on the clutch pedal 20 to operate it, a value obtained by adding the elastic pressing force of the pedal spring 60 to the elastic pressing force of the elastic damper 70 is the pedal force (reaction force) of the clutch pedal 20. Moreover, when a driver releases the clutch pedal 20 to return the clutch pedal 20 rearward, a value obtained by subtracting the frictional force corresponding to the resistance generated by the cam 40 and the pedal mechanism 50 from a value obtained by adding the returning force of the pedal spring 60 to the returning force of the elastic damper 70 acts as the returning force of the clutch pedal 20.

[0040] Furthermore, according to the invention, the restoring force of the elastic damper 70 and the frictional force generated by the cam 40 and the pedal mechanism 50 when the clutch pedal 20 is returned rearward act as the resistance value when the clutch pedal 20 is returned, which induces hysteresis.

[0041] The pedal mechanism 50 according to the invention includes an upper seat 51 and a lower seat 52 spaced apart from each other in a longitudinal direction of the clutch pedal 20, a roller 53 rotatably coupled to the upper seat 51 and in contact with the cam 40, a link 54 rotatably connecting the clutch pedal 20 to the upper seat 51, a seat holder 55 rotatably coupled to the clutch pedal 20 and fixedly coupled to the lower seat 52, a guide rod 56 formed on the upper seat 51, and a guide cylinder 57 formed on the lower seat 52 and having an inner opening 57a for allowing the guide rod 56 to be inserted and moved therein.

[0042] Reference numeral 53a denotes a roller shaft.

[0043] The upper seat 51, the roller 53, and the connecting piece 54 are positioned in a space of the pedal element 10. In particular, the cam 40, which is in contact with the roller 53, is also positioned in this space. This advantageously allows the outer dimensions of the pedal to be kept compact.

[0044] The guide rod 56 is inserted into the inner opening 57a of the guide cylinder 57 and coupled so as to be movable along the inner opening 57a. When a driver steps on the clutch pedal 20 to operate it, the total length of the guide rod 56 and the guide cylinder 57 is changed.

[0045] Since the elastic damper 70 is coaxially positioned within the pedal spring 60, compact packaging is possible. The guide rod 56 and the guide cylinder 57 are installed to pass through the elastic damper 70, and both the pedal spring 60 and the elastic damper 70 are supported at both ends by the upper seat 51 and the lower seat 52.

[0046] Therefore, when a driver steps on the clutch pedal 20 to engage it, the clutch pedal 20 rotates forward about the pedal shaft 21, and the pedal mechanism 50 connected to the clutch pedal 20 also rotates forward. At this time, with the roller 53 of the pedal mechanism 50 in contact with the cam 40 fixed to the pedal member 10, the upper seat 51 moves toward the lower seat 52. As the pedal spring 60 is compressed by the movement of the upper seat 51, the spring force increases, so the pressing force of the pedal spring 60 is the main pedal force (reaction force) that primarily occurs. As the pedal spring 60 is compressed, the elastic damper 70 is compressed, and the spring force increases, so that the pressing force of the elastic damper 70 is an additional pedal force (reaction force) that occurs secondarily.

[0047] According to the embodiment of the invention, when the clutch pedal 20 is depressed (rotated forward), the sum of the pressing force of the pedal spring 60 and the pressing force of the elastic damper 70 is generated as the pedal force (reaction force) of the clutch pedal 20. Therefore, the same level of pedal force (reaction force) as in the hydraulic clutch system is generated, and a different feeling is eliminated.

[0048] Furthermore, when a driver releases his foot from the clutch pedal 20 to release an operation, the clutch pedal 20 is returned rearward by the value obtained by adding the return force of the pedal spring 60 to the return force of the elastic damper 70. At this time, the friction force generated by the cam 40 and the pedal mechanism 50 acts as the resistance value when the clutch pedal 20 is returned.

[0049] That is, when the clutch pedal 20 is returned rearward, a value obtained by subtracting the frictional force corresponding to the resistance generated by the cam 40 and the pedal mechanism 50 from a value obtained by adding the restoring force of the pedal spring 60 to the restoring force of the elastic damper 70 acts as the restoring force of the clutch pedal 20. Specifically, when the clutch pedal 20 is returned rearward, the restoring force of the elastic damper 70 and the frictional force generated by the cam 40 and the pedal mechanism 50 act as the resistance value when the clutch pedal 20 is returned, which induces hysteresis.

[0050] Meanwhile, according to the embodiment of the invention, when the clutch pedal 20 rotates around the pedal shaft 21, the roller 53 rotates in the same direction as the clutch pedal 20 along a rotation radius R1 with the pedal shaft 21 at its center while always being in contact with the cam 40.

[0051] Specifically, a cam profile 41 in contact with the roller 53 is formed on the cam 40 so as to overlap the rotation radius R1 of the roller 53, and an overlap portion 42 is formed so as to gradually increase in a forward rotation direction when the clutch pedal 20 is depressed.

[0052] When a driver steps on the clutch pedal 20 to engage it, the clutch pedal 20 rotates forward about the pedal shaft 21, and the pedal mechanism 50 connected to the clutch pedal 20 also rotates forward. At this time, while the roller 53 of the pedal mechanism 50 is in contact with the cam 40 fixed to the pedal member 10, the roller 53 moves along the cam profile 41, and the overlap area 42 of the cam profile 41 gradually increases in a direction in which the roller 53 moves. Therefore, the greater the forward rotation amount of the clutch pedal 20, the greater the compression amount of the pedal spring 60, so that the pedal force is gradually increased.

[0053] According to the embodiment of the invention, a point where an overlap with the rotation radius R1 of the roller 53 on the cam profile 41 is greatest is an inflection point 43. The inflection point 43 is a maximum rotation time (full stroke) of the clutch pedal 20.

[0054] According to the embodiment of the invention, the cam 40 is installed on the pedal member 10, while both the clutch spring 60 and the elastic damper 70, as well as the pedal mechanism 50, are installed on the clutch pedal 20. However, the pedal mechanism 50, the clutch spring 60, and the elastic damper 70 may be installed on the pedal member 10, while the cam 40 may be installed on the clutch pedal 20.

[0055] As described, according to the embodiment of the invention, in the clutch pedal device for the electronic clutch system that does not use the hydraulic mechanism, the sum of the pressing force of the pedal spring 60 and the pressing force of the elastic damper 70 when a driver steps on the clutch pedal 20 is generated as the pedal force (reaction force) of the clutch pedal 20, and thus the same level of pedal force (reaction force) as that of the hydraulic clutch system is generated, which prevents the occurrence of a different feeling and contributes significantly to improving marketability.

[0056] Moreover, according to the invention, when a driver releases the clutch pedal 20 to return the clutch pedal 20 rearward, a value obtained by subtracting the frictional force corresponding to the resistance generated by the cam 40 and the pedal mechanism 50 from a value obtained by adding the returning force of the pedal spring 60 to the returning force of the elastic damper 70 acts as the returning force of the clutch pedal 20.Specifically, the restoring force of the elastic damper 70 and the frictional force generated by the cam 40 and the pedal mechanism 50 act as a resistance value when the clutch pedal 20 is returned to its original position, so that both the restoring force and the returning speed of the clutch pedal 20 are reduced, and thereby the ankle of a driver is prevented from being twisted by the clutch pedal 20, and further the hysteresis is induced.

Claims

[1] Clutch pedal device for an electronic clutch system, comprising: a clutch pedal (20) coupled to a pedal member (10) so as to be rotatable about a pedal shaft (21); a cam (40) fixedly coupled to the pedal element (10); a pedal mechanism (50) connected to the clutch pedal (20) while in contact with the cam (40); a pedal spring (60) provided on the pedal mechanism (50) and compressed such that a spring force increases when the clutch pedal (20) is depressed, so that a main pedal force is generated; and an elastic damper (70) provided on the pedal mechanism (50) and compressed together with the pedal spring (60) such that the spring force increases when the clutch pedal (20) is actuated, so that an additional pedal force is generated, wherein the pedal mechanism (50) comprises: an upper seat (51) and a lower seat (52) spaced apart from each other in a longitudinal direction of the clutch pedal (20); a roller (53) rotatably coupled to the upper seat (51) and in contact with the cam (40); a connecting piece (54) which rotatably connects the clutch pedal (20) to the upper seat (51); a seat holder (55) rotatably coupled to the clutch pedal (20) and fixedly coupled to the lower seat (52); a guide rod (56) formed on the upper seat (51); and a guide cylinder (57) formed on the lower seat (52) and having an inner opening (57a) to allow the guide rod (56) to be inserted and moved therein. [2] A clutch pedal device according to claim 1, wherein a sum of an elastic pressing force of the pedal spring (60) and an elastic pressing force of the elastic damper (70) when the clutch pedal (20) is operated is a pedal force (reaction force) of the clutch pedal (20). [3] A clutch pedal device according to claim 1 or 2, wherein, when the clutch pedal (20) is returned to its original position by releasing an operating force after the clutch pedal (20) is operated, a value obtained by adding a restoring force of the pedal spring (60) to a restoring force of the elastic damper (70) is larger than a frictional force generated by the cam (40) and the pedal mechanism (50); a value obtained by subtracting the frictional force generated by the cam (40) and the pedal mechanism (50) from the value obtained by adding the restoring force of the pedal spring (60) to the restoring force of the elastic damper (70) is a restoring force of the clutch pedal (20); and the restoring force of the elastic damper (70) and the frictional force generated by the cam (40) and the pedal mechanism (50) act as a resistance value when the clutch pedal (20) is returned to its original position, which generates a hysteresis. [4] A clutch pedal device according to any one of claims 1 to 3, wherein a maximum compression time of the pedal spring (60) is equal to a maximum rotation time (full stroke) of the clutch pedal (20) when the clutch pedal (20) is operated. [5] Clutch pedal device according to one of claims 1 to 4, wherein the elastic damper (70) is positioned coaxially in the pedal spring (60); wherein the guide rod (56) and the guide cylinder (57) are provided in the elastic damper (70) in such a way that they pass through it; and wherein the pedal spring (60) and the elastic damper (70) are each supported with their two ends on the upper seat (51) and the lower seat (52). [6] A clutch pedal device according to any one of claims 1 to 5, wherein, when the clutch pedal (20) rotates about the pedal shaft (21), the roller (53) rotates in the same direction as the clutch pedal (20) along a radius of rotation (R1) with the pedal shaft (21) at its center while always being in contact with the cam (40); a cam profile (41) in contact with the roller (53), on which cam (40) is formed such that it overlaps the rotation radius (R1) of the roller (53); and an overlap area (42) is designed such that it gradually increases in a forward rotational direction when the clutch pedal (20) is operated. [7] Clutch pedal device according to claim 6, wherein a point where an overlap with the rotation radius (R1) of the roller (53) on the cam profile (41) is greatest is an inflection point (43); and wherein the turning point (43) is a maximum rotation time (full stroke) of the clutch pedal (20). [8] Clutch pedal device according to one of claims 1 to 7, wherein the pedal spring (60) comprises a helical compression spring made of a steel material. [9] A clutch pedal device according to any one of claims 1 to 8, wherein the elastic damper (70) is formed of either elastomer or rubber. [10] A clutch pedal device according to any one of claims 1 to 9, wherein the pedal spring (60) comprises either a coil spring formed from a solid body or a rubber spring formed from an elastic material.

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